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CloudEvent with no datacontenttype parsed as JSON instead of plain text

See original GitHub issue

Describe the Bug Doing a demo based on this blog to consume S3 events from Kamelet The nodejs SDK can’t handle the HTTP POST request with cloud event Using the following code

Steps to Reproduce

  1. create nodejs service
  2. create trigger to send cloudevent from broker to nodejs service

Expected Behavior That the cloud event is properly handle. The knative event-display using the goland cloudevent can handle plaintext in body and missing content-type in header.

Additional context

Try both versions of the SDK 4.0.3 and 5.0.0 same error

The input event from Camel Kamelet S3 is the following

Debug Incoming Request: {
   "headers": {
     "host": "func1.default.svc.cluster.local",
     "user-agent": "Go-http-client/1.1",
     "content-length": "11",
     "accept-encoding": "gzip",
     "ce-id": "A8A6BD24B2AE5FF-0000000000000017",
     "ce-knativearrivaltime": "2021-11-17T22:48:50.315578709Z",
     "ce-source": "source",
     "ce-specversion": "1.0",
     "ce-time": "2021-11-17T22:48:50.306Z",
     "ce-type": "org.apache.camel.event",
     "forwarded": "for=;proto=http",
     "k-proxy-request": "activator",
     "traceparent": "00-0f3421c775056be4f762f87b5cee145d-5f24409ef4edc327-00",
     "x-forwarded-for": ",",
     "x-forwarded-proto": "http",
     "x-request-id": "13396d30-5487-46c1-9d21-b3fd675447e0"
   "body": "test func1\n"

The error is the following

SyntaxError: Unexpected token 
  in JSON at position 11
     at JSON.parse (<anonymous>)
     at parseJSON (/opt/app-root/src/node_modules/cloudevents/dist/parsers.js:39:67)
     at JSONParser.parse (/opt/app-root/src/node_modules/cloudevents/dist/parsers.js:40:16)
     at parseBinary (/opt/app-root/src/node_modules/cloudevents/dist/message/http/index.js:166:23)
     at Object.deserialize [as toEvent] (/opt/app-root/src/node_modules/cloudevents/dist/message/http/index.js:86:20)
     at /opt/app-root/src/index.js:70:24
     at Layer.handle [as handle_request] (/opt/app-root/src/node_modules/express/lib/router/layer.js:95:5)
     at next (/opt/app-root/src/node_modules/express/lib/router/route.js:137:13)
     at Route.dispatch (/opt/app-root/src/node_modules/express/lib/router/route.js:112:3)
     at Layer.handle [as handle_request] (/opt/app-root/src/node_modules/express/lib/router/layer.js:95:5)

cc @lance

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Comments:6 (2 by maintainers)

github_iconTop GitHub Comments

duglincommented, Nov 19, 2021

Seems to me that the SDK should not be parsing the body at all - it’s binary and should be passed on to the app as an array of bytes. If there was a content-type header that says it is JSON, then the SDK might try to be smart and convert it to a JSON object, but w/o that it seems like the SDK has no choice but to treat it as an array of bytes, not JSON.

lancecommented, Nov 19, 2021

Seems to me that the SDK should not be parsing the body at all - it’s binary and should be passed on to the app as an array of bytes.

I’ll be willing to bet this is what the Go SDK is doing.

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